package com.ht.springcloudProvider.util;

import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.stereotype.Component;

@Component
public class ApplicationContextHolder implements ApplicationContextAware {
  private static ApplicationContext applicationContext;

  @Override
  public void setApplicationContext(ApplicationContext ctx) throws BeansException {
    applicationContext = ctx;
  }

  /**
   * Get application context from everywhere
   *
   * @return
   */
  public static ApplicationContext getApplicationContext() {
    return applicationContext;
  }

  /**
   * Get bean by class
   *
   * @param clazz
   * @param <T>
   * @return
   */
  public static <T> T getBean(Class<T> clazz) {
    return applicationContext.getBean(clazz);
  }

  /**
   * Get bean by class name
   *
   * @param name
   * @param <T>
   * @return
   */
  @SuppressWarnings("unchecked")
  public static <T> T getBean(String name) {
    return (T) applicationContext.getBean(name);
  }
}